<template>
    <div>
            <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <!-- 2.为echarts准备一个具备大小（宽高）的 Dom -->
        <div id="main" style="width: 750px;height: 400px"></div>
    </el-card>
    </div>
</template>

<script>
//1.导入echarts
import * as echarts from 'echarts';
import _ from 'lodash'
export default {
    data() {
        return {
            //需要合并的数据
            options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
        }
    },
    created() {

    },
    //此时页面上的元素，已经被渲染完毕了
    async mounted() {
        //3.基于准备浩的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'))
        const {data: res} = await this.$http.get('reports/type/1')
        if(res.meta.status !== 200) {
            return this.$message.error('获取折线图数据失败！')
        }
        //准备数据和配置项
        const result = _.merge(res.data, this.options)
        //5.展示数据
        myChart.setOption(result)
    },
    methods: {

    }
}
</script>

<style lang="less" scoped>

</style>